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   Reflection Bow Formation 



   
  Reflection from smooth water sends parallel shafts of sunlight upwards. To falling raindrops this appears like a second sun shining upwards from below the horizon. The opposite point in the sky from the reflected sun is the anthelic point - the same distance above the horizon as the antisolar point is below it. Drops on the surface of a rainbow cone with an axis pointing to the anthelic point form a reflection rainbow.

The water mirror does not have to be behind the observer but when it is in front only the lower parts of the reflection bow will be seen.